DNA polymerases need a primer oligonucleotide (RNA or DNA) - their substrates are an existing 3'-OH group and a dNTP. The primase however is a typical RNA polymerase, capable of initiating polynucleotide synthesis de novo by positioning a complementary ribonucleoside 5'-triphosphate opposite its complementary DNA base.
Alison Schapker. Alison Schapker is an American television writer and producer. She is well known for her work on the ABC espionage series Alias and for the FOX science-fiction series Fringe.
Sandra Smith Photos: The Pictures You Need to See. Sandra Smith, a reporter for Fox Business Channel and host on Fox News, will co-moderate the GOP undercard debate Thursday at 6 p.m. with Fox Business anchor Trish Regan. Smith previously co-moderated the November 10 undercard debate with Smith and Wall Street Journal Washington Bureau chief Gerald Sieb.